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Benzoxazine resin containing aralkyl structure, its preparation method and use

A technology of aralkyl and benzoxazine, which is applied in the field of benzoxazine resin and its preparation, can solve the problems of large void ratio, long post-processing time, low retention rate of thermal mechanical strength, etc., and achieve synthetic reaction Smooth, easy to operate, easy to achieve the effect of industrialized continuous production

Inactive Publication Date: 2006-07-19
SICHUAN DONGCAI ENTERPRISE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This modification method has the characteristics of low cost and low curing temperature and has been widely used in recent years. Since this technical route uses hexamethylenetetramine as a curing catalyst, the product has a long post-processing time and there are still a large number of small particles during curing. Defects such as molecular release, large void ratio of the product, and low retention rate of thermal mechanical strength

Method used

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  • Benzoxazine resin containing aralkyl structure, its preparation method and use
  • Benzoxazine resin containing aralkyl structure, its preparation method and use
  • Benzoxazine resin containing aralkyl structure, its preparation method and use

Examples

Experimental program
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Effect test

Embodiment 1

[0061] Example 1: Add 100 parts of methoxyxylene monomer, 120 parts of phenol and 2 parts of p-toluenesulfonic acid into the reaction kettle, heat up (not exceeding 140°C) for dehydration, and lower the temperature when the released water reaches a certain amount After cooling, add 360 parts of formaldehyde, use 8 parts of basic catalyst to adjust the pH value of the system to 6-10, add toluene, 120 parts of 4,4'diaminodiphenylmethane (MDA) and carry out temperature-raising reflux reaction for 6 hours, then The benzoxazine resin containing aralkyl structure can be obtained by vacuum dehydration at 80-140°C; the solvent is added to obtain a stable solution of benzoxazine resin containing aralkyl structure that is uniform, transparent, and brown-red. The resin solution can be added with an accelerator according to different uses to adjust the molding time to 1-8min / 160°C.

Embodiment 2

[0062] Example 2: Add 80 parts of methoxydiphenyl ether monomer, 80 parts of phenol and 1 part of p-hydrochloric acid into the reaction kettle, heat up (not exceeding 140°C) for dehydration, and cool down when the released water reaches a certain amount, Then add 160 parts of formaldehyde, use 6 parts of basic catalyst to adjust the pH value of the system to 6-10, add toluene, 40 parts of ethylenediamine to carry out temperature-raising and reflux reaction for 6 hours, and vacuum dehydrate at 80-140 ° C to obtain aromatic The benzoxazine resin with an alkyl structure is added with a solvent to obtain a stable solution of the benzoxazine resin with an aralkyl structure that is uniform, transparent, and brownish red. The resin solution can be added with an accelerator according to different uses to adjust the molding time to 1-8min / 160°C.

Embodiment 3

[0063] Example 3: Add 100 parts of methoxydiphenyl ether monomer, 80 parts of phenol and 3 parts of p-toluenesulfonic acid into the reaction kettle, heat up (not exceeding 140°C) for dehydration, and lower the temperature when the released water reaches a certain amount Cool, then add 160 parts of formaldehyde, use 4 parts of basic catalyst to adjust the pH value of the system to 6-10, add toluene, 40 parts of ethylenediamine, carry out temperature rise and reflux reaction for 4 hours, then vacuum dehydrate at 80-140 ° C to obtain The benzoxazine resin containing an aralkyl structure is added with a solvent to obtain a stable solution of the benzoxazine resin containing an aralkyl structure that is uniform, transparent, and brownish red. The resin solution can be added with an accelerator according to different uses to adjust the molding time to 1-8min / 160°C.

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Abstract

The preparation method for benzoazine with aralkyl group comprises: adding phenols compound as 80-100 weight shares and 80-120 aralkyl compound into the reaction kettle; with 1-4 acidic catalyst, stirring to react for 1-3h at 80-140Deg; cooling to below 50Deg; adding 30-40% formaldehyde liquid as 160-360 weight shares and 4-8 basic catalyst to adjust pH value within 6-9; adding solvent and 40-120 diamine to reflux reaction for 2-8h at 85-95Deg; finally, vacuum dewatering at 80-40Deg. This product is used mainly to manufacture high-performance constructional material fit more than 180Deg, the electrically insulating material, or glass fabric and extruding material with vitrifying temperature more than 175Deg.

Description

technical field [0001] The invention belongs to the field of thermosetting resin synthesis, and relates to a benzoxazine resin containing an aralkyl structure, a preparation method and application thereof. Background technique [0002] In the 1940s, foreign countries conducted systematic research on the reaction of phenolic compounds, amine compounds and formaldehyde, and synthesized compounds containing Benzoxazine (Benzoxazine) ring structure. Compared with other condensation reactions related to phenolic formaldehyde, the outstanding feature of this reaction is that the phenolic hydroxyl group participates in the ring-closing reaction. [0003] [0004] R = hydrogen, halogen atom, alkyl, alkoxy, etc. [0005] R' = aliphatic or aromatic group [0006] Since the 1970s, foreign countries have carried out preliminary research on the ring-opening polymerization reaction and product development of benzoxazine. Since the 1990s, extensive research has been carried out at ho...

Claims

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Application Information

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IPC IPC(8): C08G73/10
Inventor 刘锋李仕文许自贵邵亚婷
Owner SICHUAN DONGCAI ENTERPRISE GRP CO LTD
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